TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
XFS (loop0): SB sanity check failed
general protection fault: 0000 [#1] PREEMPT SMP KASAN
XFS (loop0): Metadata corruption detected at xfs_sb_read_verify+0x4b2/0x600 fs/xfs/libxfs/xfs_sb.c:720, xfs_sb block 0xffffffffffffffff 
CPU: 0 PID: 3294 Comm: syz-executor4 Not tainted 4.20.0-rc3+ #341
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 arch/x86/kvm/lapic.c:579
Code: 45 84 ed 0f 84 da 07 00 00 e8 e8 51 66 00 48 8d 4b 14 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 89 8d 70 fe ff ff 48 c1 ea 03 <0f> b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f5
XFS (loop0): Unmount and run xfs_repair
RSP: 0018:ffff8881ca8b6ed8 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014
RDX: 0000000000000002 RSI: ffffffff81193908 RDI: 0000000000000005
RBP: ffff8881ca8b7078 R08: ffff8881bdf64700 R09: ffffed103b5c5b67
R10: ffffed103b5c5b67 R11: ffff8881dae2db3b R12: ffff8881ca8b7050
XFS (loop0): First 128 bytes of corrupted metadata buffer:
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881ca8b6fd0
FS:  00007f87da7bf700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3c593f7d0 CR3: 00000001b2c25000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
00000000: 58 46 53 42 00 00 10 00 00 00 00 03 00 00 10 00  XFSB............
00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000020: 98 4f 0b 50 42 b6 4b 06 bc 86 cb a3 e6 cc 3f 80  .O.PB.K.......?.
 kvm_emulate_hypercall+0xa1a/0xf20 arch/x86/kvm/x86.c:6999
00000030: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80  ................
00000040: 00 00 f9 ff ff ff ff 80 00 00 00 00 00 00 00 82  ................
00000050: 1c 00 00 01 00 00 10 00 00 00 00 01 00 00 00 00  ................
 handle_vmcall+0x15/0x20 arch/x86/kvm/vmx.c:7510
 vmx_handle_exit+0x33d/0x4630 arch/x86/kvm/vmx.c:10600
00000060: 00 08 06 c0 34 a4 02 00 01 00 00 10 07 00 00 00  ....4...........
00000070: 00 00 00 00 00 00 00 00 0c 09 00 00 00 00 00 00  ................
XFS (loop0): SB validate failed with error -117.
------------[ cut here ]------------
downgrading a read lock
WARNING: CPU: 1 PID: 3308 at kernel/locking/lockdep.c:3556 __lock_downgrade kernel/locking/lockdep.c:3556 [inline]
WARNING: CPU: 1 PID: 3308 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819